Micromechanical modeling of elastic properties in polyolefins

Bédoui, Fahmi; Diani, Julie; Régnier, Gilles

doi:10.1016/j.polymer.2004.01.028

Cited by 67 publications

(22 citation statements)

References 38 publications

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“…Transition from restricted to mobile configuration could be related to the maximum of the

\tan δ

vs. temperature plot . Since the crystalline lamellae were usually considered purely elastic , the viscosity will be attributed only to the amorphous phase. Therefore, increasing the crystallinity would contribute to lower the maximum

\tan (δ)

plot.…”

Section: Resultsmentioning

confidence: 99%

“…Thus micromechanical models were used to help predict the overall elastic , viscoelastic , and plastic mechanical properties of such materials. It is well established that the presence of the crystalline lamellae enhance the mechanical properties . However, the interaction between the crystals and the amorphous phase and its effect on the overall mechanical properties of the polymers is still mechanically unquantified.…”

Section: Introductionmentioning

confidence: 99%

“…However, the interaction between the crystals and the amorphous phase and its effect on the overall mechanical properties of the polymers is still mechanically unquantified. Amorphous phase was considered, mechanically, unaffected, and thus have the same mechanical properties of the bulk amorphous polymer . So whenever discrepancies between experimental and predicted properties were encountered, the confinement of the amorphous phase due to the presence of the crystalline phase has been singled out .…”

Section: Introductionmentioning

confidence: 99%

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Mechanical investigation of confined amorphous phase in semicrystalline polymers: Case of PET and PLA

et al. 2014

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The effect of confinement onto the mechanical properties of the amorphous phase of Polyethylene terephthalate (PET) and poly(lactic acid) (PLA) was investigated. These polymers have the advantage of being in bulk amorphous or in semicrystalline state allowing mechanical and physical investigation of the amorphous phase on bulk and confined configuration. Based on small angle X-ray scattering (SAXS), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA) experiments, the micro-structural arrangement of the amorphous and crystalline phase, the rigid amorphous fraction, and the viscoelastic mechanical properties of the different semicrystalline samples were investigated. DSC results help quantifying the rigid amorphous fraction dependence on the crystallinity. DMA measurements lead to quantify the viscoelastic properties of the free and confined amorphous phases for PET and PLA polymers. Indeed, based on the DMA tests, where the maximum of tan(d) peak is usually related to the glass transition temperature, shifts upon crystallization, the mechanical properties of the restricted and mobile amorphous phase were determined. This result was correlated along with the amorphous phase thickness distribution determined by SAXS results. This observation was bolstered based on literature results about geometrical confinement configurations and their effect on the glass transition temperature of polymeric materials. POLYM. ENG. SCI.,

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“…Transition from restricted to mobile configuration could be related to the maximum of the

\tan δ

\tan (δ)

plot.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical investigation of confined amorphous phase in semicrystalline polymers: Case of PET and PLA

et al. 2014

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“…It should be noted that the dynamic properties of XHDPE at the ultrasonic frequency of 40 kHz are not measured and unavailable in literature. The shear storage modulus in the glassy state required in simulation was calculated using the measured storage Young's modulus of XHDPE below its glass transition temperature using the Poisson ratio of 0.46 of the HDPE . Since the ultrasonic frequency is within the rubbery plateau, the value of

G_{N}^{0}

of the linear PE is taken as the shear modulus in the rubbery state.…”

Section: Simulation Resultsmentioning

confidence: 99%

Ultrasonic decrosslinking of peroxide crosslinked HDPE in twin screw extrusion: Part II simulation and experiment

Huang

Isayev

2016

Polymer Engineering & Sci

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“…These homogenization methods can be directly applied to uniform domains, which consist of a single phase, or to complex domains, which are aggregates of several phases. There are many examples of these methods being used to estimate the elastic properties of semicrystalline polymers . A number of micromechanical models are based on the self‐consistent approach and successfully predict large plastic deformations in High‐Density Polyethylene (HDPE) and PET .…”

Section: Introductionmentioning

confidence: 99%

Micromechanical modeling of roll‐to‐roll processing of oriented polyethylene terephthalate films

Poluektov

Dommelen

Govaert

et al. 2016

J of Applied Polymer Sci

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In this article, the thermo-mechanical time-dependent behavior of oriented polyethylene terephthalate (PET) films, which are used as a substrate material for flexible Organic Light-Emitting Diode (OLED)s, is analyzed. These films are subjected to conditions that are representative for the industrial manufacturing process. Effects of creep and thermal shrinkage are experimentally observed simultaneously. The aim of the article is to demonstrate the ability of the micromechanically-based model, which was previously used to separately describe both creep and thermal shrinkage of the polyethylene terephthalate film, to simulate experimentally observed anisotropic behavior of the film under complex loading conditions. This anisotropic behavior results from the microstructure, the internal stress state, and differences in constitutive behavior of the phases.

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Micromechanical modeling of elastic properties in polyolefins

Cited by 67 publications

References 38 publications

Mechanical investigation of confined amorphous phase in semicrystalline polymers: Case of PET and PLA

Mechanical investigation of confined amorphous phase in semicrystalline polymers: Case of PET and PLA

Ultrasonic decrosslinking of peroxide crosslinked HDPE in twin screw extrusion: Part II simulation and experiment

Micromechanical modeling of roll‐to‐roll processing of oriented polyethylene terephthalate films

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